<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <c:if test="${sessionScope.user==null}">
    	<a href="${pageContext.request.contextPath}/login.jsp">登录</a>
    </c:if>
    <c:if test="${sessionScope.user!=null}">
    	欢迎您：${sessionScope.user.username}
      <%
      response.sendRedirect(request.getContextPath());       %>
    </c:if>
</body>
</html>